CN104569931A - Monostation radar target characteristic measurement method for determining region of synchronous scattering points - Google Patents
Monostation radar target characteristic measurement method for determining region of synchronous scattering points Download PDFInfo
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- CN104569931A CN104569931A CN201410797741.7A CN201410797741A CN104569931A CN 104569931 A CN104569931 A CN 104569931A CN 201410797741 A CN201410797741 A CN 201410797741A CN 104569931 A CN104569931 A CN 104569931A
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- 238000000691 measurement method Methods 0.000 title abstract 2
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 28
- 238000005259 measurement Methods 0.000 claims abstract description 27
- 239000011358 absorbing material Substances 0.000 claims abstract description 9
- 238000013459 approach Methods 0.000 claims description 9
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- 238000012545 processing Methods 0.000 description 4
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a monostation radar target characteristic measurement method for determining a region of synchronous scattering points. The method comprises the following steps: establishing a three-dimensional rectangular coordinate system in a darkroom; determining the position where an emitting-receiving antenna is in the three-dimensional rectangular coordinate system; taking the position where an emitting-receiving antenna is as the center of a circle, taking the nearest distance and the furthest distance away from the emitting-receiving antenna in a testing region where a target to be measured is as semi-diameters respectively, and constructing two ball surfaces in the darkroom; taking the two ball surfaces and the space between the two ball surfaces as the region of synchronous scattering points through monostation radar target characteristic measurement. According to the method, the region of synchronous scattering points that signals of a target to be measured at any position of a testing region reach the emitting-receiving antenna simultaneously in the darkroom can be quickly searched; by uniformly adding wave-absorbing materials with high performance in the region or finding a solution to remove scattering sources, the scattering signal strength of the parts can be greatly reduced, and the influence of scattering of the parts on the measurement accuracy of the scattering signals of the target to be measured is reduced.
Description
Technical field
The present invention relates to scattering point area determination method.More specifically, a kind of monostatic radar target signature measurement synchronous scattering point area determination method is related to.
Background technology
Along with the development of stealthy anti-stealth technololgy, require more and more higher to the measuring accuracy of radar target signature.In order to the radar target signature of satisfied classics measures far field condition, usually measure in microwave dark room.Far field, indoor single station radar target signature instrumentation plan as shown in Figure 1, single stand measurement and emitting antenna and receiving antenna are positioned at same position or are same antenna, target to be measured is arranged in test section, usual test section be one couch cylindrical, the spacing of target to be measured and transmit receive antenna meets far field condition, emitting antenna irradiates electromagnetic wave to target to be measured, and target scattering electromagnetic wave to be measured is received antenna and receives.
Current in microwave dark room during instrumentation radar target list station far-field characteristic, adopt sweep measurement pattern more, then frequency sweep result being transformed to time domain, by adding time domain window, rejecting the scattered signal turning back to receiving antenna At All Other Times.As shown in Figure 2, scheme a in Fig. 2 and represent time-domain signal when there is not target to be measured in test section, figure b represents in test section time-domain signal when there is target to be measured, namely the peak signal (see peak value 4) of observing in figure b rectangle frame represents target scattering signal to be measured, suitable time domain window function is added to figure b test signal, just can other scattered signal unwanted (as peak value 1, peak value 2, peak value 3, peak value 5 etc.) reject, these larger peak values 1, 2, 3, 5 signals all have clear and definite physical meaning, as represented cable reflection signal, the straight leakage signal of antenna, darkroom inner support scattered signal, wall scattered signal etc. behind darkroom, because these signals are different from the time that target scattering signal to be measured arrives receiving antenna, so all can be rejected by time gate, only obtain the echo signal to be measured in rectangle frame.But this processing mode cannot reject the scattered signal arriving receiving antenna in darkroom with target scattering signal to be measured simultaneously, if there is some object in each wall in darkroom or darkroom, these scattering positions are equal with the distance between transmit receive antenna with target to be measured with the distance of transmit receive antenna, then these unwanted scattered signals also will fall in the rectangle frame of figure b, arrive with echo signal to be measured simultaneously, then will be difficult to reject by the above-mentioned mode adding time domain door.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of monostatic radar target signature measurement synchronous scattering point area determination method, to find the synchronous scattering point region arriving transmit receive antenna in darkroom with optional position, test section echo signal to be measured fast simultaneously.
For solving the problems of the technologies described above, the present invention adopts following technical proposals:
A kind of monostatic radar target signature measurement synchronous scattering point area determination method, the step of the method comprises:
Three-dimensional cartesian coordinate system is set up in darkroom;
Transmit receive antenna position T is determined in described three-dimensional cartesian coordinate system; With described transmit receive antenna position T for the center of circle, respectively with the minimum distance TA from described transmit receive antenna of test section, target place to be measured and maximum distance TB for radius, in described darkroom build two Surface of Spheres;
Space between described two Surface of Spheres and two Surface of Spheres is described monostatic radar target signature measurement synchronous scattering point region.
Preferably, described three-dimensional cartesian coordinate system is with any corner of the darkroom front wall at described transmit receive antenna rear for coordinate origin O, and being X-axis with length direction, is Y-axis with Width, take short transverse as Z axis.
Describedly in described three-dimensional cartesian coordinate system, determine that the step of transmit receive antenna position T comprises:
Determine the three-dimensional coordinate of described transmit receive antenna position T in described three-dimensional cartesian coordinate system, the three-dimensional coordinate of described transmit receive antenna position T is (X
t, Y
t, Z
t)
Described with described transmit receive antenna position T for the center of circle, respectively with test section, target place to be measured from the minimum distance TA of described transmit receive antenna and maximum distance TB for radius, the step building two Surface of Spheres in described darkroom comprises:
Determine the three-dimensional coordinate of described target place to be measured test section range transmission receiving antenna closest approach position A and position, solstics B; The three-dimensional coordinate of described closest approach position A is (X
a, Y
a, Z
a), the three-dimensional coordinate of described solstics position B is (X
b, Y
b, Z
b);
Calculate the distance TA of described transmit receive antenna position T and described target place to be measured test section range transmission receiving antenna closest approach position A;
Calculate the distance TB of described transmit receive antenna position T and described target place to be measured range transmission receiving antenna solstics, test section position B;
With described transmit receive antenna position T for the center of circle, be the first radius with described transmit receive antenna and test section, described target place to be measured range transmission receiving antenna closest approach distance TA, in described darkroom, build the first Surface of Sphere; With described transmit receive antenna position T for the center of circle, be the second radius with described transmit receive antenna and described target place to be measured test section range transmission receiving antenna solstics distance TB, in described darkroom, build the second Surface of Sphere.
Preferably, the region that the space between described first and second Surface of Spheres and two Surface of Spheres and each and inner space, darkroom object in darkroom intersect be described target to be measured when being positioned at optional position, test section and described target to be measured to transmit receive antenna apart from identical all monostatic radar target signature measurement synchronous scattering point regions.
Preferably, described monostatic radar target signature measurement synchronous scattering point region be transmit signals to this region more received antenna time of receiving interference scattered signal with transmit signals to described test section target to be measured and be received antenna again and receive time of described target scattering signal to be measured identical region.
Preferably, the front-back wall in the ground in the side wall in the space of described monostatic radar target signature measurement synchronous scattering point region between two Surface of Spheres and two Surface of Spheres and described darkroom, darkroom, roof, darkroom, darkroom or the crossing region of the object that exists in inner space, darkroom.
Preferably, the step of the method is included in further in described monostatic radar target signature measurement synchronous scattering point region and places absorbing material or remove the object being positioned at synchronous scattering point region.
In the present invention, monostatic radar target signature measurement synchronous scattering point region is referred to as synchronous scattering point region.
Beneficial effect of the present invention is as follows:
Existing monostatic radar target signature measurement signal processing mode cannot reject those scattered signals simultaneously arriving receiving antenna in darkroom with target scattering signal to be measured, if there is some object in each wall in darkroom or darkroom, these scattering positions are equal with the distance between transmit receive antenna with target to be measured with the distance of transmit receive antenna, arrive with echo signal to be measured, then the mode by simply adding time domain door will be difficult to reject simultaneously.Monostatic radar target signature measurement synchronous scattering point area determination method of the present invention can solve above deficiency effectively, the synchronous scattering point maximum region simultaneously arriving transmit receive antenna in darkroom with the target scattering signal to be measured of optional position, test section can be found fast by the inventive method, by adding high performance absorbing material to these regions, significantly can reduce the scattered signal intensity at these positions, reduce the impact of these position scatterings on target scattering signal measurement precision to be measured; If inner space, darkroom exists some object, then these scattering positions can be moved, move to non-confluence, reject these scattering sources; The method also can be measured darkroom absorbing material laying work area design to radar target signature and play booster action, plays the object optimized and measure darkroom performance.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 illustrates far field, indoor single station radar target signature instrumentation plan;
Fig. 2 a illustrates that far field, the existing indoor single station radar target signature when there is not target to be measured in test section measures Time Domain Processing schematic diagram;
Fig. 2 b illustrates that far field, the existing indoor single station radar target signature when there is target to be measured in test section measures Time Domain Processing schematic diagram;
Fig. 3 illustrates that far field, indoor single station radar target signature is measured synchronous scattering point region and determined schematic diagram;
Fig. 4 illustrates the three-dimensional cartesian coordinate system in darkroom;
Fig. 5 illustrates the synchronous scattering point region on the ground in darkroom;
Fig. 6 illustrates the synchronous scattering point region on the roof in darkroom;
Fig. 7 illustrates the synchronous scattering point region of the both walls in darkroom.
Embodiment
In order to be illustrated more clearly in the present invention, below in conjunction with preferred embodiments and drawings, the present invention is described further.Parts similar in accompanying drawing represent with identical Reference numeral.It will be appreciated by those skilled in the art that specifically described content is illustrative and nonrestrictive, should not limit the scope of the invention with this below.
The present invention discloses a kind of scattering point area determination method, particularly discloses a kind of monostatic radar target signature measurement synchronous scattering point area determination method, comprising:
Three-dimensional cartesian coordinate system is set up in darkroom; Three-dimensional cartesian coordinate system is with any corner of the darkroom front wall at transmit receive antenna rear for coordinate origin O, and being X-axis with length direction, is Y-axis with Width, take short transverse as Z axis; Determine the three-dimensional coordinate of transmit receive antenna 1 position T in three-dimensional cartesian coordinate system; The three-dimensional coordinate of transmit receive antenna 1 position T is (X
t, Y
t, Z
t); Determine the three-dimensional coordinate of test section 2, target 3 place to be measured range transmission receiving antenna 1 closest approach position A and position, solstics B; The three-dimensional coordinate of test section 2, target 3 place to be measured range transmission receiving antenna 1 closest approach position A is (X
a, Y
a, Z
a), the three-dimensional coordinate of range transmission receiving antenna 1 solstics, test section 2, target 3 place to be measured position B is (X
b, Y
b, Z
b); With transmit receive antenna 1 position T for the center of circle, calculate the distance TA of transmit receive antenna 1 position and test section 2, target to be measured 3 place range transmission receiving antenna 1 closest approach position A, and be the first radius with this distance, in darkroom, build the first Surface of Sphere; With described transmit receive antenna 1 position T for the center of circle, calculate the distance TB of transmit receive antenna 1 position T and test section 2, target to be measured 3 place range transmission receiving antenna 1 solstics position B, and be the second radius with this distance, in darkroom, build the second Surface of Sphere; The region that space between first and second Surface of Spheres and two spheres and each and inner space, darkroom object in darkroom intersect be target 3 to be measured when being positioned at 2 optional position, test section and target to be measured 3 to transmit receive antenna 1 apart from identical all synchronous scattering point regions; Synchronous scattering point region be transmit signals to this region the more received antenna time receiving interference scattered signal and the target to be measured transmitting signals to relevant position, test section 2 be received time of the main signal that antenna receives identical region again.
The principle of the inventive method finds to arrive transmit receive antenna 1 apart from identical scattering point maximum region with the target to be measured 3 of optional position, test section 2 in darkroom.Far field, single station as indoor in Fig. 3 radar target signature is measured synchronous scattering point region and is determined shown in schematic diagram, target 3 to be measured can be arranged in the optional position of test section 2, as shown in Figure 3, test section 2 test position A is from the nearest position of transmit receive antenna 1, and test section 2 position B is from transmit receive antenna 1 position farthest.We with transmit receive antenna 1 position T for the center of circle, respectively with TA, TB length is half path length, two Surface of Spheres are built in darkroom, the each wall in space and darkroom then between these two Surface of Spheres and two Surface of Spheres, roof, all intersectional regions that ground and inner space, darkroom object intersect be target 3 to be measured when being positioned at 2 optional position, test section with target 3 to be measured to transmit receive antenna 1 apart from identical all synchronous scattering point regions, as met synchronous scattering point region Q1 and Q2 of distance condition in Fig. 3, namely transmit signals to scattering point region Q1 or Q2 more received antenna time of receiving interference scattered signal with transmit signals to target 3 to be measured in test section 2 and be received antenna again to receive time of target 3 signal to be measured identical.
According to the different layouts in any one darkroom, interior items placement area, darkroom length not square one, the scattering point region with object synchronization to be measured can be found according to above-mentioned steps, these scattering point regions can be positioned at the side wall in darkroom, also can be positioned at the ground in darkroom or roof or front-back wall, also can be some objects that inner space, darkroom exists;
Find these synchronous scattering point regions, can high performance absorbing material be added in these synchronous scattering point regions or remove these scattering positions, significantly can reduce the scattered signal intensity at these positions, reduce the scattering at these positions to the impact of target scattering signal measurement precision to be measured, the method can be measured darkroom absorbing material laying work area design to radar target signature and play booster action, plays the object optimized and measure darkroom performance.
Fig. 1, Fig. 2 are that in prior art, time domain to add process, can see the present invention and existing time domain add to process exist different below:
The present invention can to find with target 3 scattered signal to be measured to transmit receive antenna 1 apart from identical scattering point signal maximum region place, by interpolation absorbing material or the mode removing scattering source, greatly reduce the impact that these synchronous scattering point signals are measured target 3 to be measured, this is that prior art cannot realize.
The present invention also can measure darkroom absorbing material laying work area design to radar target signature and play booster action, plays the object optimized and measure darkroom performance.
Below by one group of embodiment, technical scheme of the present invention is described further:
1, three-dimensional cartesian coordinate system is set up in long × wide × high monostatic radar target signature measurement darkroom for 20m × 10m × 10m, as shown in Figure 4, coordinate origin is orientated as with any one foundation of the darkroom front wall at emitting antenna rear, O point as shown in Figure 4, take length direction as X-axis, be Y-axis with Width, take short transverse as Z axis, first determine the three-dimensional coordinate (X of transmit receive antenna 1
t, Y
t, Z
t) be (3,5,5);
2, the three-dimensional coordinate (X of the position A that test section 2, target place to be measured range transmission receiving antenna 1 is nearest is determined
a, Y
a, Z
a) be (14,5,5), determine the three-dimensional coordinate (X of test section, target 3 place to be measured 2 from transmit receive antenna 1 position B farthest
b, Y
b, Z
b) be (16,5,6), calculate TA, TB distance respectively and be respectively 11m, 13.04m;
3, with transmit receive antenna 1 position T (3,5,5) be the center of circle, be half path length with TA, TB length 11m, 13.04m respectively, in darkroom, build the first and second Surface of Spheres that radius is different, then the space between these two Surface of Spheres and two Surface of Spheres and the region that each wall in darkroom, roof, ground and inner space, darkroom object intersect be target 3 to be measured when being positioned at 2 optional position, test section and target to be measured to transmit receive antenna 1 apart from identical all monostatic radar target signature measurement synchronous scattering point regions;
4, program and calculate, obtain the synchronous scattering point region on the ground in darkroom respectively as shown in the region between the dark circles curve in Fig. 5, the synchronous scattering point region on the roof in darkroom is as shown in the region between the dark circles curve in Fig. 6, the synchronous scattering point region of the both walls in darkroom is as shown in the region between the dark circles curve in Fig. 7, the corresponding scattering point region of transverse and longitudinal coordinate difference is in the geometric position of each wall, as calculated, behind the darkroom front wall (metope close to test section 2) of this size layout and darkroom all there is not synchronous scattering point region in wall, the antenna that cause is chosen and target area to be measured correspond to darkroom, width in darkroom and short transverse are all symmetrical, so Fig. 5, 6, in 7, three Regional Distributions are consistent.
Obviously; the above embodiment of the present invention is only for example of the present invention is clearly described; and be not the restriction to embodiments of the present invention; for those of ordinary skill in the field; can also make other changes in different forms on the basis of the above description; here cannot give exhaustive to all embodiments, every belong to technical scheme of the present invention the apparent change of extending out or variation be still in the row of protection scope of the present invention.
Claims (8)
1. a monostatic radar target signature measurement synchronous scattering point area determination method, it is characterized in that, the method comprises the following steps:
Three-dimensional cartesian coordinate system is set up in darkroom;
Transmit receive antenna position T is determined in described three-dimensional cartesian coordinate system;
With described transmit receive antenna position T for the center of circle, respectively with test section, target place to be measured from the minimum distance TA of described transmit receive antenna and maximum distance TB for radius, in described darkroom, build two Surface of Spheres;
Space between described two Surface of Spheres and two Surface of Spheres is described monostatic radar target signature measurement synchronous scattering point region.
2. method according to claim 1, it is characterized in that, described three-dimensional cartesian coordinate system for coordinate origin O, take length direction as X-axis with any corner of the described darkroom front wall at described transmit receive antenna rear, being Y-axis with Width, take short transverse as Z axis.
3. method according to claim 1, is characterized in that, describedly in described three-dimensional cartesian coordinate system, determines that the step of transmit receive antenna position T comprises:
Determine the three-dimensional coordinate of described transmit receive antenna position T in described three-dimensional cartesian coordinate system.
4. method according to claim 1, it is characterized in that, described with described transmit receive antenna position T for the center of circle, respectively with test section, target place to be measured from the minimum distance TA of described transmit receive antenna and maximum distance TB for radius, the step building two Surface of Spheres in described darkroom comprises:
Determine test section, described target place to be measured apart from described transmit receive antenna closest approach position A and position, solstics B the three-dimensional coordinate in described three-dimensional cartesian coordinate system;
Calculate the distance of TA and TB;
With described transmit receive antenna position T for the center of circle, be the first radius with described transmit receive antenna and test section, described target place to be measured apart from described transmit receive antenna closest approach distance TA, in described darkroom, build the first Surface of Sphere;
With described transmit receive antenna position T for the center of circle, be the second radius with described transmit receive antenna and test section, described target place to be measured apart from described transmit receive antenna solstics distance TB, in described darkroom, build the second Surface of Sphere.
5. method according to claim 4, is characterized in that: the region that the space between described first and second Surface of Spheres and two Surface of Spheres and each and inner space, darkroom object in darkroom intersect be described target to be measured when being positioned at described optional position, test section and described target to be measured to transmit receive antenna apart from identical described monostatic radar target signature measurement synchronous scattering point region.
6. method according to claim 1, is characterized in that: described monostatic radar target signature measurement synchronous scattering point region be transmit signals to this region more received antenna time of receiving interference scattered signal with transmit signals to described test section target to be measured and be received antenna again and receive time of described target scattering signal to be measured identical region.
7. method according to claim 1, is characterized in that: the side wall in the space of described monostatic radar target signature measurement synchronous scattering point region between described two Surface of Spheres and two Surface of Spheres and described darkroom, the ground in darkroom, the roof in darkroom, the front-back wall in darkroom or the crossing region of the object existed in inner space, darkroom.
8. method according to claim 1, is characterized in that: the step of the method is included in described monostatic radar target signature measurement synchronous scattering point region further places absorbing material or removes the object being positioned at synchronous scattering point region.
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Citations (2)
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| CN103558593A (en) * | 2013-10-16 | 2014-02-05 | 北京航空航天大学 | Method for obtaining position of vessel particular point based on strong scattering points |
| CN103885051A (en) * | 2014-03-21 | 2014-06-25 | 西安电子科技大学 | Simple scattering point cone target parameter estimation method based on time-frequency imaging |
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2014
- 2014-12-18 CN CN201410797741.7A patent/CN104569931A/en active Pending
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| CN103558593A (en) * | 2013-10-16 | 2014-02-05 | 北京航空航天大学 | Method for obtaining position of vessel particular point based on strong scattering points |
| CN103885051A (en) * | 2014-03-21 | 2014-06-25 | 西安电子科技大学 | Simple scattering point cone target parameter estimation method based on time-frequency imaging |
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Application publication date: 20150429 |